Could you share more details about where this fails for you? Specifically:
Your OS and Mailspring version
Which view you’re in when you press the shortcut
What happens (nothing? navigates somewhere unexpected?)
Also, please try updating to v1.21.1 and let us know if the behavior changes. The fix that landed in v1.20.0 addressed one specific flow — if it’s still broken in another flow we want to track it down.